I am about to buy me a new gun. I want somethin that I can just go out and shoot and have fun with. The place I get my guns from has a nice AK-47 and 2 nice AR-15's. The AK-47 is around 400 and the AR-15's are 700 and the other around 850. The cheaper AR-15 is just smaller than the other one but they are both the same gun just different sizes. What yall think I should get?